Method of making alloys



PATENT OFFICE.

ARTHUR GEORGE MUMFORD, 0F COLGHESTER, ENGLAND.

METHOD OF MAKING ALLOYS.

No Drawing.

To all whom it may concern.

Be it known that I, ARTHUR GEORGE MUM- FORD, a subject of the King of Great Britain and Ireland, residing at the Culver Street Engineerin county of ssex, England, director of public company, have invented a new and useful Improvement in Methods of Making Alloys, of which the following 'is a specification.

This invention relates to an improved method of making alloys of copper containing fractional percentages of tin and zinc and it has for its object generally to make reliable castings for floats for automatic feed water regulators and the like which are subjected to very high temperatures and pressures and a constant variation of same and which will not become water logged and specifically to so mix the small percentage of zinc, which is a highly volatile metal, withthe other metals that the percentage of samecan be insured with a reasonable degree of accuracy.

Specification of Letters Iatent.

Works, Colchester, in they Patented Oct. 12, 1920.

Application filed January 26, 1920. Serial No. 354,240.

A suitable alloy for the purpose comprises 86.168% of copper, 11.97% of tin and 1.842% of zinc.

In making this alloy a white metal alloy composed of 61% of tin, 29.7% of copper and 9.3% of zinc is first made and run into an ingot, and then the final alloy is made of 80.36% of copper and 19.64% of the aforesaid white metal alloy.

Castings of this alloy are made in iron chills and have the characteristics that they are homogeneous, non-absorbent and will stand both high temperatures and high pressure and continual variations of same.

I claim?- T he improved method of making an alloy of copper, tin and zinc consisting in first making an alloy of these metals in the following proportions:-tin 61%, copper 29.7% and zinc 9.3%, and then making the final alloy of 19.64% of said white metal alloy and 80.36% of copper.

ARTHUR GEORGE MUMFORD. 

